Reverse Engineering the iPod Classic's Undocumented Mikey Chip
Summary
This article documents reverse-engineering the iPod Classic's Mikey chip to enable inline earphone remote controls within Rockbox. It covers the research process, register-level exploration, and the discovery that register 0x2F enables remote reporting, plus the chip's sleep and delayed release behavior. It also describes upstream submission in Rockbox and highlights open-source hardware hacking and custom boot/logo work.